#include <stdio.h>

#define M  3.0e-23          //��ʶ������ 3.0e-23  ָ����ʽ��ʶʵ�� 
int main(int argc, char const *argv[])
{
    int  num = 0 ;
    printf("请输入水的夸脱数 >:");
    scanf("%d",&num);
    printf("num=%d\n",num);
    printf("%d 夸脱的水中有 %e 个水分子\n",num, num*950/M );
    return 0;
}
